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| -rw-r--r-- | devtools/client/inspector/markup/markup.js | 2682 |
1 files changed, 2682 insertions, 0 deletions
diff --git a/devtools/client/inspector/markup/markup.js b/devtools/client/inspector/markup/markup.js new file mode 100644 index 0000000000..849af6c155 --- /dev/null +++ b/devtools/client/inspector/markup/markup.js @@ -0,0 +1,2682 @@ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +"use strict"; + +const flags = require("resource://devtools/shared/flags.js"); +const nodeConstants = require("resource://devtools/shared/dom-node-constants.js"); +const nodeFilterConstants = require("resource://devtools/shared/dom-node-filter-constants.js"); +const EventEmitter = require("resource://devtools/shared/event-emitter.js"); +const { LocalizationHelper } = require("resource://devtools/shared/l10n.js"); +const { PluralForm } = require("resource://devtools/shared/plural-form.js"); +const AutocompletePopup = require("resource://devtools/client/shared/autocomplete-popup.js"); +const KeyShortcuts = require("resource://devtools/client/shared/key-shortcuts.js"); +const { + scrollIntoViewIfNeeded, +} = require("resource://devtools/client/shared/scroll.js"); +const { PrefObserver } = require("resource://devtools/client/shared/prefs.js"); +const MarkupElementContainer = require("resource://devtools/client/inspector/markup/views/element-container.js"); +const MarkupReadOnlyContainer = require("resource://devtools/client/inspector/markup/views/read-only-container.js"); +const MarkupTextContainer = require("resource://devtools/client/inspector/markup/views/text-container.js"); +const RootContainer = require("resource://devtools/client/inspector/markup/views/root-container.js"); +const WalkerEventListener = require("resource://devtools/client/inspector/shared/walker-event-listener.js"); + +loader.lazyRequireGetter( + this, + ["createDOMMutationBreakpoint", "deleteDOMMutationBreakpoint"], + "resource://devtools/client/framework/actions/index.js", + true +); +loader.lazyRequireGetter( + this, + "MarkupContextMenu", + "resource://devtools/client/inspector/markup/markup-context-menu.js" +); +loader.lazyRequireGetter( + this, + "SlottedNodeContainer", + "resource://devtools/client/inspector/markup/views/slotted-node-container.js" +); +loader.lazyRequireGetter( + this, + "getLongString", + "resource://devtools/client/inspector/shared/utils.js", + true +); +loader.lazyRequireGetter( + this, + "openContentLink", + "resource://devtools/client/shared/link.js", + true +); +loader.lazyRequireGetter( + this, + "HTMLTooltip", + "resource://devtools/client/shared/widgets/tooltip/HTMLTooltip.js", + true +); +loader.lazyRequireGetter( + this, + "UndoStack", + "resource://devtools/client/shared/undo.js", + true +); +loader.lazyRequireGetter( + this, + "clipboardHelper", + "resource://devtools/shared/platform/clipboard.js" +); +loader.lazyRequireGetter( + this, + "beautify", + "resource://devtools/shared/jsbeautify/beautify.js" +); +loader.lazyRequireGetter( + this, + "getTabPrefs", + "resource://devtools/shared/indentation.js", + true +); + +const INSPECTOR_L10N = new LocalizationHelper( + "devtools/client/locales/inspector.properties" +); + +// Page size for pageup/pagedown +const PAGE_SIZE = 10; +const DEFAULT_MAX_CHILDREN = 100; +const DRAG_DROP_AUTOSCROLL_EDGE_MAX_DISTANCE = 50; +const DRAG_DROP_AUTOSCROLL_EDGE_RATIO = 0.1; +const DRAG_DROP_MIN_AUTOSCROLL_SPEED = 2; +const DRAG_DROP_MAX_AUTOSCROLL_SPEED = 8; +const DRAG_DROP_HEIGHT_TO_SPEED = 500; +const DRAG_DROP_HEIGHT_TO_SPEED_MIN = 0.5; +const DRAG_DROP_HEIGHT_TO_SPEED_MAX = 1; +const ATTR_COLLAPSE_ENABLED_PREF = "devtools.markup.collapseAttributes"; +const ATTR_COLLAPSE_LENGTH_PREF = "devtools.markup.collapseAttributeLength"; +const BEAUTIFY_HTML_ON_COPY_PREF = "devtools.markup.beautifyOnCopy"; + +/** + * These functions are called when a shortcut (as defined in `_initShortcuts`) occurs. + * Each property in the following object corresponds to one of the shortcut that is + * handled by the markup-view. + * Each property value is a function that takes the markup-view instance as only + * argument, and returns a boolean that signifies whether the event should be consumed. + * By default, the event gets consumed after the shortcut handler returns, + * this means its propagation is stopped. If you do want the shortcut event + * to continue propagating through DevTools, then return true from the handler. + */ +const shortcutHandlers = { + // Localizable keys + "markupView.hide.key": markupView => { + const node = markupView._selectedContainer.node; + const walkerFront = node.walkerFront; + + if (node.hidden) { + walkerFront.unhideNode(node); + } else { + walkerFront.hideNode(node); + } + }, + "markupView.edit.key": markupView => { + markupView.beginEditingHTML(markupView._selectedContainer.node); + }, + "markupView.scrollInto.key": markupView => { + markupView.scrollNodeIntoView(); + }, + // Generic keys + Delete: markupView => { + markupView.deleteNodeOrAttribute(); + }, + Backspace: markupView => { + markupView.deleteNodeOrAttribute(true); + }, + Home: markupView => { + const rootContainer = markupView.getContainer(markupView._rootNode); + markupView.navigate(rootContainer.children.firstChild.container); + }, + Left: markupView => { + if (markupView._selectedContainer.expanded) { + markupView.collapseNode(markupView._selectedContainer.node); + } else { + const parent = markupView._selectionWalker().parentNode(); + if (parent) { + markupView.navigate(parent.container); + } + } + }, + Right: markupView => { + if ( + !markupView._selectedContainer.expanded && + markupView._selectedContainer.hasChildren + ) { + markupView._expandContainer(markupView._selectedContainer); + } else { + const next = markupView._selectionWalker().nextNode(); + if (next) { + markupView.navigate(next.container); + } + } + }, + Up: markupView => { + const previousNode = markupView._selectionWalker().previousNode(); + if (previousNode) { + markupView.navigate(previousNode.container); + } + }, + Down: markupView => { + const nextNode = markupView._selectionWalker().nextNode(); + if (nextNode) { + markupView.navigate(nextNode.container); + } + }, + PageUp: markupView => { + const walker = markupView._selectionWalker(); + let selection = markupView._selectedContainer; + for (let i = 0; i < PAGE_SIZE; i++) { + const previousNode = walker.previousNode(); + if (!previousNode) { + break; + } + selection = previousNode.container; + } + markupView.navigate(selection); + }, + PageDown: markupView => { + const walker = markupView._selectionWalker(); + let selection = markupView._selectedContainer; + for (let i = 0; i < PAGE_SIZE; i++) { + const nextNode = walker.nextNode(); + if (!nextNode) { + break; + } + selection = nextNode.container; + } + markupView.navigate(selection); + }, + Enter: markupView => { + if (!markupView._selectedContainer.canFocus) { + markupView._selectedContainer.canFocus = true; + markupView._selectedContainer.focus(); + return false; + } + return true; + }, + Space: markupView => { + if (!markupView._selectedContainer.canFocus) { + markupView._selectedContainer.canFocus = true; + markupView._selectedContainer.focus(); + return false; + } + return true; + }, + Esc: markupView => { + if (markupView.isDragging) { + markupView.cancelDragging(); + return false; + } + // Prevent cancelling the event when not + // dragging, to allow the split console to be toggled. + return true; + }, +}; + +/** + * Vocabulary for the purposes of this file: + * + * MarkupContainer - the structure that holds an editor and its + * immediate children in the markup panel. + * - MarkupElementContainer: markup container for element nodes + * - MarkupTextContainer: markup container for text / comment nodes + * - MarkupReadonlyContainer: markup container for other nodes + * Node - A content node. + * object.elt - A UI element in the markup panel. + */ + +/** + * The markup tree. Manages the mapping of nodes to MarkupContainers, + * updating based on mutations, and the undo/redo bindings. + * + * @param {Inspector} inspector + * The inspector we're watching. + * @param {iframe} frame + * An iframe in which the caller has kindly loaded markup.xhtml. + * @param {XULWindow} controllerWindow + * Will enable the undo/redo feature from devtools/client/shared/undo. + * Should be a XUL window, will typically point to the toolbox window. + */ +function MarkupView(inspector, frame, controllerWindow) { + EventEmitter.decorate(this); + + this.controllerWindow = controllerWindow; + this.inspector = inspector; + this.highlighters = inspector.highlighters; + this.walker = this.inspector.walker; + this._frame = frame; + this.win = this._frame.contentWindow; + this.doc = this._frame.contentDocument; + this._elt = this.doc.getElementById("root"); + this.telemetry = this.inspector.telemetry; + this._breakpointIDsInLocalState = new Map(); + this._containersToUpdate = new Map(); + + this.maxChildren = Services.prefs.getIntPref( + "devtools.markup.pagesize", + DEFAULT_MAX_CHILDREN + ); + + this.collapseAttributes = Services.prefs.getBoolPref( + ATTR_COLLAPSE_ENABLED_PREF + ); + this.collapseAttributeLength = Services.prefs.getIntPref( + ATTR_COLLAPSE_LENGTH_PREF + ); + + // Creating the popup to be used to show CSS suggestions. + // The popup will be attached to the toolbox document. + this.popup = new AutocompletePopup(inspector.toolbox.doc, { + autoSelect: true, + }); + + this._containers = new Map(); + // This weakmap will hold keys used with the _containers map, in order to retrieve the + // slotted container for a given node front. + this._slottedContainerKeys = new WeakMap(); + + // Binding functions that need to be called in scope. + this._handleRejectionIfNotDestroyed = + this._handleRejectionIfNotDestroyed.bind(this); + this._isImagePreviewTarget = this._isImagePreviewTarget.bind(this); + this._onWalkerMutations = this._onWalkerMutations.bind(this); + this._onBlur = this._onBlur.bind(this); + this._onContextMenu = this._onContextMenu.bind(this); + this._onCopy = this._onCopy.bind(this); + this._onCollapseAttributesPrefChange = + this._onCollapseAttributesPrefChange.bind(this); + this._onWalkerNodeStatesChanged = this._onWalkerNodeStatesChanged.bind(this); + this._onFocus = this._onFocus.bind(this); + this._onResourceAvailable = this._onResourceAvailable.bind(this); + this._onTargetAvailable = this._onTargetAvailable.bind(this); + this._onTargetDestroyed = this._onTargetDestroyed.bind(this); + this._onMouseClick = this._onMouseClick.bind(this); + this._onMouseMove = this._onMouseMove.bind(this); + this._onMouseOut = this._onMouseOut.bind(this); + this._onMouseUp = this._onMouseUp.bind(this); + this._onNewSelection = this._onNewSelection.bind(this); + this._onToolboxPickerCanceled = this._onToolboxPickerCanceled.bind(this); + this._onToolboxPickerHover = this._onToolboxPickerHover.bind(this); + this._onDomMutation = this._onDomMutation.bind(this); + + // Listening to various events. + this._elt.addEventListener("blur", this._onBlur, true); + this._elt.addEventListener("click", this._onMouseClick); + this._elt.addEventListener("contextmenu", this._onContextMenu); + this._elt.addEventListener("mousemove", this._onMouseMove); + this._elt.addEventListener("mouseout", this._onMouseOut); + this._frame.addEventListener("focus", this._onFocus); + this.inspector.selection.on("new-node-front", this._onNewSelection); + this._unsubscribeFromToolboxStore = this.inspector.toolbox.store.subscribe( + this._onDomMutation + ); + + if (flags.testing) { + // In tests, we start listening immediately to avoid having to simulate a mousemove. + this._initTooltips(); + } + + this.win.addEventListener("copy", this._onCopy); + this.win.addEventListener("mouseup", this._onMouseUp); + this.inspector.toolbox.nodePicker.on( + "picker-node-canceled", + this._onToolboxPickerCanceled + ); + this.inspector.toolbox.nodePicker.on( + "picker-node-hovered", + this._onToolboxPickerHover + ); + + // Event listeners for highlighter events + this.onHighlighterShown = data => + this.handleHighlighterEvent("highlighter-shown", data); + this.onHighlighterHidden = data => + this.handleHighlighterEvent("highlighter-hidden", data); + this.inspector.highlighters.on("highlighter-shown", this.onHighlighterShown); + this.inspector.highlighters.on( + "highlighter-hidden", + this.onHighlighterHidden + ); + + this._onNewSelection(); + if (this.inspector.selection.nodeFront) { + this.expandNode(this.inspector.selection.nodeFront); + } + + this._prefObserver = new PrefObserver("devtools.markup"); + this._prefObserver.on( + ATTR_COLLAPSE_ENABLED_PREF, + this._onCollapseAttributesPrefChange + ); + this._prefObserver.on( + ATTR_COLLAPSE_LENGTH_PREF, + this._onCollapseAttributesPrefChange + ); + + this._initShortcuts(); + + this._walkerEventListener = new WalkerEventListener(this.inspector, { + "display-change": this._onWalkerNodeStatesChanged, + "scrollable-change": this._onWalkerNodeStatesChanged, + "overflow-change": this._onWalkerNodeStatesChanged, + mutations: this._onWalkerMutations, + }); + + this.resourceCommand = this.inspector.toolbox.resourceCommand; + this.resourceCommand.watchResources([this.resourceCommand.TYPES.ROOT_NODE], { + onAvailable: this._onResourceAvailable, + }); + + this.targetCommand = this.inspector.commands.targetCommand; + this.targetCommand.watchTargets({ + types: [this.targetCommand.TYPES.FRAME], + onAvailable: this._onTargetAvailable, + onDestroyed: this._onTargetDestroyed, + }); +} + +MarkupView.prototype = { + /** + * How long does a node flash when it mutates (in ms). + */ + CONTAINER_FLASHING_DURATION: 500, + + _selectedContainer: null, + + get contextMenu() { + if (!this._contextMenu) { + this._contextMenu = new MarkupContextMenu(this); + } + + return this._contextMenu; + }, + + get eventDetailsTooltip() { + if (!this._eventDetailsTooltip) { + // This tooltip will be attached to the toolbox document. + this._eventDetailsTooltip = new HTMLTooltip(this.toolbox.doc, { + type: "arrow", + consumeOutsideClicks: false, + }); + } + + return this._eventDetailsTooltip; + }, + + get toolbox() { + return this.inspector.toolbox; + }, + + get undo() { + if (!this._undo) { + this._undo = new UndoStack(); + this._undo.installController(this.controllerWindow); + } + + return this._undo; + }, + + _onDomMutation() { + const domMutationBreakpoints = + this.inspector.toolbox.store.getState().domMutationBreakpoints + .breakpoints; + const breakpointIDsInCurrentState = []; + for (const breakpoint of domMutationBreakpoints) { + const nodeFront = breakpoint.nodeFront; + const mutationType = breakpoint.mutationType; + const enabledStatus = breakpoint.enabled; + breakpointIDsInCurrentState.push(breakpoint.id); + // If breakpoint is not in local state + if (!this._breakpointIDsInLocalState.has(breakpoint.id)) { + this._breakpointIDsInLocalState.set(breakpoint.id, breakpoint); + if (!this._containersToUpdate.has(nodeFront)) { + this._containersToUpdate.set(nodeFront, new Map()); + } + } + this._containersToUpdate.get(nodeFront).set(mutationType, enabledStatus); + } + // If a breakpoint is in local state but not current state, it has been + // removed by the user. + for (const id of this._breakpointIDsInLocalState.keys()) { + if (breakpointIDsInCurrentState.includes(id) === false) { + const nodeFront = this._breakpointIDsInLocalState.get(id).nodeFront; + const mutationType = + this._breakpointIDsInLocalState.get(id).mutationType; + this._containersToUpdate.get(nodeFront).delete(mutationType); + this._breakpointIDsInLocalState.delete(id); + } + } + // Update each container + for (const nodeFront of this._containersToUpdate.keys()) { + const mutationBreakpoints = this._containersToUpdate.get(nodeFront); + const container = this.getContainer(nodeFront); + container.update(mutationBreakpoints); + if (this._containersToUpdate.get(nodeFront).size === 0) { + this._containersToUpdate.delete(nodeFront); + } + } + }, + + /** + * Handle promise rejections for various asynchronous actions, and only log errors if + * the markup view still exists. + * This is useful to silence useless errors that happen when the markup view is + * destroyed while still initializing (and making protocol requests). + */ + _handleRejectionIfNotDestroyed(e) { + if (!this._destroyed) { + console.error(e); + } + }, + + _initTooltips() { + if (this.imagePreviewTooltip) { + return; + } + // The tooltips will be attached to the toolbox document. + this.imagePreviewTooltip = new HTMLTooltip(this.toolbox.doc, { + type: "arrow", + useXulWrapper: true, + }); + this._enableImagePreviewTooltip(); + }, + + _enableImagePreviewTooltip() { + this.imagePreviewTooltip.startTogglingOnHover( + this._elt, + this._isImagePreviewTarget + ); + }, + + _disableImagePreviewTooltip() { + this.imagePreviewTooltip.stopTogglingOnHover(); + }, + + _onToolboxPickerHover(nodeFront) { + this.showNode(nodeFront).then(() => { + this._showNodeAsHovered(nodeFront); + }, console.error); + }, + + /** + * If the element picker gets canceled, make sure and re-center the view on the + * current selected element. + */ + _onToolboxPickerCanceled() { + if (this._selectedContainer) { + scrollIntoViewIfNeeded(this._selectedContainer.editor.elt); + } + }, + + isDragging: false, + _draggedContainer: null, + + _onMouseMove(event) { + // Note that in tests, we start listening immediately from the constructor to avoid having to simulate a mousemove. + // Also note that initTooltips bails out if it is called many times, so it isn't an issue to call it a second + // time from here in case tests are doing a mousemove. + this._initTooltips(); + + let target = event.target; + + if (this._draggedContainer) { + this._draggedContainer.onMouseMove(event); + } + // Auto-scroll if we're dragging. + if (this.isDragging) { + event.preventDefault(); + this._autoScroll(event); + return; + } + + // Show the current container as hovered and highlight it. + // This requires finding the current MarkupContainer (walking up the DOM). + while (!target.container) { + if (target.tagName.toLowerCase() === "body") { + return; + } + target = target.parentNode; + } + + const container = target.container; + if (this._hoveredContainer !== container) { + this._showBoxModel(container.node); + } + this._showContainerAsHovered(container); + + this.emit("node-hover"); + }, + + /** + * If focus is moved outside of the markup view document and there is a + * selected container, make its contents not focusable by a keyboard. + */ + _onBlur(event) { + if (!this._selectedContainer) { + return; + } + + const { relatedTarget } = event; + if (relatedTarget && relatedTarget.ownerDocument === this.doc) { + return; + } + + if (this._selectedContainer) { + this._selectedContainer.clearFocus(); + } + }, + + _onContextMenu(event) { + this.contextMenu.show(event); + }, + + /** + * Executed on each mouse-move while a node is being dragged in the view. + * Auto-scrolls the view to reveal nodes below the fold to drop the dragged + * node in. + */ + _autoScroll(event) { + const docEl = this.doc.documentElement; + + if (this._autoScrollAnimationFrame) { + this.win.cancelAnimationFrame(this._autoScrollAnimationFrame); + } + + // Auto-scroll when the mouse approaches top/bottom edge. + const fromBottom = docEl.clientHeight - event.pageY + this.win.scrollY; + const fromTop = event.pageY - this.win.scrollY; + const edgeDistance = Math.min( + DRAG_DROP_AUTOSCROLL_EDGE_MAX_DISTANCE, + docEl.clientHeight * DRAG_DROP_AUTOSCROLL_EDGE_RATIO + ); + + // The smaller the screen, the slower the movement. + const heightToSpeedRatio = Math.max( + DRAG_DROP_HEIGHT_TO_SPEED_MIN, + Math.min( + DRAG_DROP_HEIGHT_TO_SPEED_MAX, + docEl.clientHeight / DRAG_DROP_HEIGHT_TO_SPEED + ) + ); + + if (fromBottom <= edgeDistance) { + // Map our distance range to a speed range so that the speed is not too + // fast or too slow. + const speed = map( + fromBottom, + 0, + edgeDistance, + DRAG_DROP_MIN_AUTOSCROLL_SPEED, + DRAG_DROP_MAX_AUTOSCROLL_SPEED + ); + + this._runUpdateLoop(() => { + docEl.scrollTop -= + heightToSpeedRatio * (speed - DRAG_DROP_MAX_AUTOSCROLL_SPEED); + }); + } + + if (fromTop <= edgeDistance) { + const speed = map( + fromTop, + 0, + edgeDistance, + DRAG_DROP_MIN_AUTOSCROLL_SPEED, + DRAG_DROP_MAX_AUTOSCROLL_SPEED + ); + + this._runUpdateLoop(() => { + docEl.scrollTop += + heightToSpeedRatio * (speed - DRAG_DROP_MAX_AUTOSCROLL_SPEED); + }); + } + }, + + /** + * Run a loop on the requestAnimationFrame. + */ + _runUpdateLoop(update) { + const loop = () => { + update(); + this._autoScrollAnimationFrame = this.win.requestAnimationFrame(loop); + }; + loop(); + }, + + _onMouseClick(event) { + // From the target passed here, let's find the parent MarkupContainer + // and forward the event if needed. + let parentNode = event.target; + let container; + while (parentNode !== this.doc.body) { + if (parentNode.container) { + container = parentNode.container; + break; + } + parentNode = parentNode.parentNode; + } + + if (typeof container.onContainerClick === "function") { + // Forward the event to the container if it implements onContainerClick. + container.onContainerClick(event); + } + }, + + _onMouseUp(event) { + if (this._draggedContainer) { + this._draggedContainer.onMouseUp(event); + } + + this.indicateDropTarget(null); + this.indicateDragTarget(null); + if (this._autoScrollAnimationFrame) { + this.win.cancelAnimationFrame(this._autoScrollAnimationFrame); + } + }, + + _onCollapseAttributesPrefChange() { + this.collapseAttributes = Services.prefs.getBoolPref( + ATTR_COLLAPSE_ENABLED_PREF + ); + this.collapseAttributeLength = Services.prefs.getIntPref( + ATTR_COLLAPSE_LENGTH_PREF + ); + this.update(); + }, + + cancelDragging() { + if (!this.isDragging) { + return; + } + + for (const [, container] of this._containers) { + if (container.isDragging) { + container.cancelDragging(); + break; + } + } + + this.indicateDropTarget(null); + this.indicateDragTarget(null); + if (this._autoScrollAnimationFrame) { + this.win.cancelAnimationFrame(this._autoScrollAnimationFrame); + } + }, + + _hoveredContainer: null, + + /** + * Show a NodeFront's container as being hovered + * + * @param {NodeFront} nodeFront + * The node to show as hovered + */ + _showNodeAsHovered(nodeFront) { + const container = this.getContainer(nodeFront); + this._showContainerAsHovered(container); + }, + + _showContainerAsHovered(container) { + if (this._hoveredContainer === container) { + return; + } + + if (this._hoveredContainer) { + this._hoveredContainer.hovered = false; + } + + container.hovered = true; + this._hoveredContainer = container; + }, + + async _onMouseOut(event) { + // Emulate mouseleave by skipping any relatedTarget inside the markup-view. + if (this._elt.contains(event.relatedTarget)) { + return; + } + + if (this._autoScrollAnimationFrame) { + this.win.cancelAnimationFrame(this._autoScrollAnimationFrame); + } + if (this.isDragging) { + return; + } + + await this._hideBoxModel(); + if (this._hoveredContainer) { + this._hoveredContainer.hovered = false; + } + this._hoveredContainer = null; + + this.emit("leave"); + }, + + /** + * Show the Box Model Highlighter on a given node front + * + * @param {NodeFront} nodeFront + * The node for which to show the highlighter. + * @param {Object} options + * Configuration object with options for the Box Model Highlighter. + * @return {Promise} Resolves after the highlighter for this nodeFront is shown. + */ + _showBoxModel(nodeFront, options) { + return this.inspector.highlighters.showHighlighterTypeForNode( + this.inspector.highlighters.TYPES.BOXMODEL, + nodeFront, + options + ); + }, + + /** + * Hide the Box Model Highlighter for any node that may be highlighted. + * + * @return {Promise} Resolves when the highlighter is hidden. + */ + _hideBoxModel() { + return this.inspector.highlighters.hideHighlighterType( + this.inspector.highlighters.TYPES.BOXMODEL + ); + }, + + /** + * Delegate handler for highlighter events. + * + * This is the place to observe for highlighter events, check the highlighter type and + * event name, then react for example by modifying the DOM. + * + * @param {String} eventName + * Highlighter event name. One of: "highlighter-hidden", "highlighter-shown" + * @param {Object} data + * Object with data associated with the highlighter event. + * {String} data.type + * Highlighter type + * {NodeFront} data.nodeFront + * NodeFront of the node associated with the highlighter event + * {Object} data.options + * Optional configuration passed to the highlighter when shown + * {CustomHighlighterFront} data.highlighter + * Highlighter instance + * + */ + handleHighlighterEvent(eventName, data) { + switch (data.type) { + // Toggle the "active" CSS class name on flex and grid display badges next to + // elements in the Markup view when a coresponding flex or grid highlighter is + // shown or hidden for a node. + case this.inspector.highlighters.TYPES.FLEXBOX: + case this.inspector.highlighters.TYPES.GRID: + const { nodeFront } = data; + if (!nodeFront) { + return; + } + + // Find the badge corresponding to the node from the highlighter event payload. + const container = this.getContainer(nodeFront); + const badge = container?.editor?.displayBadge; + if (badge) { + badge.classList.toggle("active", eventName == "highlighter-shown"); + } + + // There is a limit to how many grid highlighters can be active at the same time. + // If the limit was reached, disable all non-active grid badges. + if (data.type === this.inspector.highlighters.TYPES.GRID) { + // Matches badges for "grid", "inline-grid" and "subgrid" + const selector = "[data-display*='grid']:not(.active)"; + const isLimited = + this.inspector.highlighters.isGridHighlighterLimitReached(); + Array.from(this._elt.querySelectorAll(selector)).map(el => { + el.classList.toggle("interactive", !isLimited); + }); + } + break; + } + }, + + /** + * Used by tests + */ + getSelectedContainer() { + return this._selectedContainer; + }, + + /** + * Get the MarkupContainer object for a given node, or undefined if + * none exists. + * + * @param {NodeFront} nodeFront + * The node to get the container for. + * @param {Boolean} slotted + * true to get the slotted version of the container. + * @return {MarkupContainer} The container for the provided node. + */ + getContainer(node, slotted) { + const key = this._getContainerKey(node, slotted); + return this._containers.get(key); + }, + + /** + * Register a given container for a given node/slotted node. + * + * @param {NodeFront} nodeFront + * The node to set the container for. + * @param {Boolean} slotted + * true if the container represents the slotted version of the node. + */ + setContainer(node, container, slotted) { + const key = this._getContainerKey(node, slotted); + return this._containers.set(key, container); + }, + + /** + * Check if a MarkupContainer object exists for a given node/slotted node + * + * @param {NodeFront} nodeFront + * The node to check. + * @param {Boolean} slotted + * true to check for a container matching the slotted version of the node. + * @return {Boolean} True if a container exists, false otherwise. + */ + hasContainer(node, slotted) { + const key = this._getContainerKey(node, slotted); + return this._containers.has(key); + }, + + _getContainerKey(node, slotted) { + if (!slotted) { + return node; + } + + if (!this._slottedContainerKeys.has(node)) { + this._slottedContainerKeys.set(node, { node }); + } + return this._slottedContainerKeys.get(node); + }, + + _isContainerSelected(container) { + if (!container) { + return false; + } + + const selection = this.inspector.selection; + return ( + container.node == selection.nodeFront && + container.isSlotted() == selection.isSlotted() + ); + }, + + update() { + const updateChildren = node => { + this.getContainer(node).update(); + for (const child of node.treeChildren()) { + updateChildren(child); + } + }; + + // Start with the documentElement + let documentElement; + for (const node of this._rootNode.treeChildren()) { + if (node.isDocumentElement === true) { + documentElement = node; + break; + } + } + + // Recursively update each node starting with documentElement. + updateChildren(documentElement); + }, + + /** + * Executed when the mouse hovers over a target in the markup-view and is used + * to decide whether this target should be used to display an image preview + * tooltip. + * Delegates the actual decision to the corresponding MarkupContainer instance + * if one is found. + * + * @return {Promise} the promise returned by + * MarkupElementContainer._isImagePreviewTarget + */ + async _isImagePreviewTarget(target) { + // From the target passed here, let's find the parent MarkupContainer + // and ask it if the tooltip should be shown + if (this.isDragging) { + return false; + } + + let parent = target, + container; + while (parent) { + if (parent.container) { + container = parent.container; + break; + } + parent = parent.parentNode; + } + + if (container instanceof MarkupElementContainer) { + return container.isImagePreviewTarget(target, this.imagePreviewTooltip); + } + + return false; + }, + + /** + * Given the known reason, should the current selection be briefly highlighted + * In a few cases, we don't want to highlight the node: + * - If the reason is null (used to reset the selection), + * - if it's "inspector-default-selection" (initial node selected, either when + * opening the inspector or after a navigation/reload) + * - if it's "picker-node-picked" or "picker-node-previewed" (node selected with the + * node picker. Note that this does not include the "Inspect element" context menu, + * which has a dedicated reason, "browser-context-menu"). + * - if it's "test" (this is a special case for mochitest. In tests, we often + * need to select elements but don't necessarily want the highlighter to come + * and go after a delay as this might break test scenarios) + * We also do not want to start a brief highlight timeout if the node is + * already being hovered over, since in that case it will already be + * highlighted. + */ + _shouldNewSelectionBeHighlighted() { + const reason = this.inspector.selection.reason; + const unwantedReasons = [ + "inspector-default-selection", + "nodeselected", + "picker-node-picked", + "picker-node-previewed", + "test", + ]; + + const isHighlight = this._isContainerSelected(this._hoveredContainer); + return !isHighlight && reason && !unwantedReasons.includes(reason); + }, + + /** + * React to new-node-front selection events. + * Highlights the node if needed, and make sure it is shown and selected in + * the view. + */ + _onNewSelection(nodeFront, reason) { + const selection = this.inspector.selection; + // this will probably leak. + // TODO: use resource api listeners? + if (nodeFront) { + nodeFront.walkerFront.on( + "display-change", + this._onWalkerNodeStatesChanged + ); + nodeFront.walkerFront.on( + "scrollable-change", + this._onWalkerNodeStatesChanged + ); + nodeFront.walkerFront.on( + "overflow-change", + this._onWalkerNodeStatesChanged + ); + nodeFront.walkerFront.on("mutations", this._onWalkerMutations); + } + + if (this.htmlEditor) { + this.htmlEditor.hide(); + } + if (this._isContainerSelected(this._hoveredContainer)) { + this._hoveredContainer.hovered = false; + this._hoveredContainer = null; + } + + if (!selection.isNode()) { + this.unmarkSelectedNode(); + return; + } + + const done = this.inspector.updating("markup-view"); + let onShowBoxModel; + + // Highlight the element briefly if needed. + if (this._shouldNewSelectionBeHighlighted()) { + onShowBoxModel = this._showBoxModel(nodeFront, { + duration: this.inspector.HIGHLIGHTER_AUTOHIDE_TIMER, + }); + } + + const slotted = selection.isSlotted(); + const smoothScroll = reason === "reveal-from-slot"; + const onShow = this.showNode(selection.nodeFront, { slotted, smoothScroll }) + .then(() => { + // We could be destroyed by now. + if (this._destroyed) { + return Promise.reject("markupview destroyed"); + } + + // Mark the node as selected. + const container = this.getContainer(selection.nodeFront, slotted); + this._markContainerAsSelected(container); + + // Make sure the new selection is navigated to. + this.maybeNavigateToNewSelection(); + return undefined; + }) + .catch(this._handleRejectionIfNotDestroyed); + + Promise.all([onShowBoxModel, onShow]).then(done); + }, + + /** + * Maybe make selected the current node selection's MarkupContainer depending + * on why the current node got selected. + */ + async maybeNavigateToNewSelection() { + const { reason, nodeFront } = this.inspector.selection; + + // The list of reasons that should lead to navigating to the node. + const reasonsToNavigate = [ + // If the user picked an element with the element picker. + "picker-node-picked", + // If the user shift-clicked (previewed) an element. + "picker-node-previewed", + // If the user selected an element with the browser context menu. + "browser-context-menu", + // If the user added a new node by clicking in the inspector toolbar. + "node-inserted", + ]; + + // If the user performed an action with a keyboard, move keyboard focus to + // the markup tree container. + if (reason && reason.endsWith("-keyboard")) { + this.getContainer(this._rootNode).elt.focus(); + } + + if (reasonsToNavigate.includes(reason)) { + // not sure this is necessary + const root = await nodeFront.walkerFront.getRootNode(); + this.getContainer(root).elt.focus(); + this.navigate(this.getContainer(nodeFront)); + } + }, + + /** + * Create a TreeWalker to find the next/previous + * node for selection. + */ + _selectionWalker(start) { + const walker = this.doc.createTreeWalker( + start || this._elt, + nodeFilterConstants.SHOW_ELEMENT, + function (element) { + if ( + element.container && + element.container.elt === element && + element.container.visible + ) { + return nodeFilterConstants.FILTER_ACCEPT; + } + return nodeFilterConstants.FILTER_SKIP; + } + ); + walker.currentNode = this._selectedContainer.elt; + return walker; + }, + + _onCopy(evt) { + // Ignore copy events from editors + if (this._isInputOrTextarea(evt.target)) { + return; + } + + const selection = this.inspector.selection; + if (selection.isNode()) { + this.copyOuterHTML(); + } + evt.stopPropagation(); + evt.preventDefault(); + }, + + /** + * Copy the outerHTML of the selected Node to the clipboard. + */ + copyOuterHTML() { + if (!this.inspector.selection.isNode()) { + return; + } + const node = this.inspector.selection.nodeFront; + + switch (node.nodeType) { + case nodeConstants.ELEMENT_NODE: + copyLongHTMLString(node.walkerFront.outerHTML(node)); + break; + case nodeConstants.COMMENT_NODE: + getLongString(node.getNodeValue()).then(comment => { + clipboardHelper.copyString("<!--" + comment + "-->"); + }); + break; + case nodeConstants.DOCUMENT_TYPE_NODE: + clipboardHelper.copyString(node.doctypeString); + break; + } + }, + + /** + * Copy the innerHTML of the selected Node to the clipboard. + */ + copyInnerHTML() { + const nodeFront = this.inspector.selection.nodeFront; + if (!this.inspector.selection.isNode()) { + return; + } + + copyLongHTMLString(nodeFront.walkerFront.innerHTML(nodeFront)); + }, + + /** + * Given a type and link found in a node's attribute in the markup-view, + * attempt to follow that link (which may result in opening a new tab, the + * style editor or debugger). + */ + followAttributeLink(type, link) { + if (!type || !link) { + return; + } + + const nodeFront = this.inspector.selection.nodeFront; + if (type === "uri" || type === "cssresource" || type === "jsresource") { + // Open link in a new tab. + nodeFront.inspectorFront + .resolveRelativeURL(link, this.inspector.selection.nodeFront) + .then(url => { + if (type === "uri") { + openContentLink(url); + } else if (type === "cssresource") { + return this.toolbox.viewGeneratedSourceInStyleEditor(url); + } else if (type === "jsresource") { + return this.toolbox.viewGeneratedSourceInDebugger(url); + } + return null; + }) + .catch(console.error); + } else if (type == "idref") { + // Select the node in the same document. + nodeFront.walkerFront + .document(nodeFront) + .then(doc => { + return nodeFront.walkerFront + .querySelector(doc, "#" + CSS.escape(link)) + .then(node => { + if (!node) { + this.emit("idref-attribute-link-failed"); + return; + } + this.inspector.selection.setNodeFront(node); + }); + }) + .catch(console.error); + } + }, + + /** + * Register all key shortcuts. + */ + _initShortcuts() { + const shortcuts = new KeyShortcuts({ + window: this.win, + }); + + // Keep a pointer on shortcuts to destroy them when destroying the markup + // view. + this._shortcuts = shortcuts; + + this._onShortcut = this._onShortcut.bind(this); + + // Process localizable keys + [ + "markupView.hide.key", + "markupView.edit.key", + "markupView.scrollInto.key", + ].forEach(name => { + const key = INSPECTOR_L10N.getStr(name); + shortcuts.on(key, event => this._onShortcut(name, event)); + }); + + // Process generic keys: + [ + "Delete", + "Backspace", + "Home", + "Left", + "Right", + "Up", + "Down", + "PageUp", + "PageDown", + "Esc", + "Enter", + "Space", + ].forEach(key => { + shortcuts.on(key, event => this._onShortcut(key, event)); + }); + }, + + /** + * Key shortcut listener. + */ + _onShortcut(name, event) { + if (this._isInputOrTextarea(event.target)) { + return; + } + + const handler = shortcutHandlers[name]; + const shouldPropagate = handler(this); + if (shouldPropagate) { + return; + } + + event.stopPropagation(); + event.preventDefault(); + }, + + /** + * Check if a node is an input or textarea + */ + _isInputOrTextarea(element) { + const name = element.tagName.toLowerCase(); + return name === "input" || name === "textarea"; + }, + + /** + * If there's an attribute on the current node that's currently focused, then + * delete this attribute, otherwise delete the node itself. + * + * @param {Boolean} moveBackward + * If set to true and if we're deleting the node, focus the previous + * sibling after deletion, otherwise the next one. + */ + deleteNodeOrAttribute(moveBackward) { + const focusedAttribute = this.doc.activeElement + ? this.doc.activeElement.closest(".attreditor") + : null; + if (focusedAttribute) { + // The focused attribute might not be in the current selected container. + const container = focusedAttribute.closest("li.child").container; + container.removeAttribute(focusedAttribute.dataset.attr); + } else { + this.deleteNode(this._selectedContainer.node, moveBackward); + } + }, + + /** + * Returns a value indicating whether a node can be deleted. + * + * @param {NodeFront} nodeFront + * The node to test for deletion + */ + isDeletable(nodeFront) { + return !( + nodeFront.isDocumentElement || + nodeFront.nodeType == nodeConstants.DOCUMENT_NODE || + nodeFront.nodeType == nodeConstants.DOCUMENT_TYPE_NODE || + nodeFront.nodeType == nodeConstants.DOCUMENT_FRAGMENT_NODE || + nodeFront.isAnonymous + ); + }, + + /** + * Delete a node from the DOM. + * This is an undoable action. + * + * @param {NodeFront} node + * The node to remove. + * @param {Boolean} moveBackward + * If set to true, focus the previous sibling, otherwise the next one. + */ + deleteNode(node, moveBackward) { + if (!this.isDeletable(node)) { + return; + } + + const container = this.getContainer(node); + + // Retain the node so we can undo this... + node.walkerFront + .retainNode(node) + .then(() => { + const parent = node.parentNode(); + let nextSibling = null; + this.undo.do( + () => { + node.walkerFront.removeNode(node).then(siblings => { + nextSibling = siblings.nextSibling; + const prevSibling = siblings.previousSibling; + let focusNode = moveBackward ? prevSibling : nextSibling; + + // If we can't move as the user wants, we move to the other direction. + // If there is no sibling elements anymore, move to the parent node. + if (!focusNode) { + focusNode = nextSibling || prevSibling || parent; + } + + const isNextSiblingText = nextSibling + ? nextSibling.nodeType === nodeConstants.TEXT_NODE + : false; + const isPrevSiblingText = prevSibling + ? prevSibling.nodeType === nodeConstants.TEXT_NODE + : false; + + // If the parent had two children and the next or previous sibling + // is a text node, then it now has only a single text node, is about + // to be in-lined; and focus should move to the parent. + if ( + parent.numChildren === 2 && + (isNextSiblingText || isPrevSiblingText) + ) { + focusNode = parent; + } + + if (container.selected) { + this.navigate(this.getContainer(focusNode)); + } + }); + }, + () => { + const isValidSibling = nextSibling && !nextSibling.isPseudoElement; + nextSibling = isValidSibling ? nextSibling : null; + node.walkerFront.insertBefore(node, parent, nextSibling); + } + ); + }) + .catch(console.error); + }, + + /** + * Scroll the node into view. + */ + scrollNodeIntoView() { + if (!this.inspector.selection.isNode()) { + return; + } + + this.inspector.selection.nodeFront.scrollIntoView(); + }, + + async toggleMutationBreakpoint(name) { + if (!this.inspector.selection.isElementNode()) { + return; + } + + const toolboxStore = this.inspector.toolbox.store; + const nodeFront = this.inspector.selection.nodeFront; + + if (nodeFront.mutationBreakpoints[name]) { + toolboxStore.dispatch(deleteDOMMutationBreakpoint(nodeFront, name)); + } else { + toolboxStore.dispatch(createDOMMutationBreakpoint(nodeFront, name)); + } + }, + + /** + * If an editable item is focused, select its container. + */ + _onFocus(event) { + let parent = event.target; + while (!parent.container) { + parent = parent.parentNode; + } + if (parent) { + this.navigate(parent.container); + } + }, + + /** + * Handle a user-requested navigation to a given MarkupContainer, + * updating the inspector's currently-selected node. + * + * @param {MarkupContainer} container + * The container we're navigating to. + */ + navigate(container) { + if (!container) { + return; + } + + this._markContainerAsSelected(container, "treepanel"); + }, + + /** + * Make sure a node is included in the markup tool. + * + * @param {NodeFront} node + * The node in the content document. + * @param {Boolean} flashNode + * Whether the newly imported node should be flashed + * @param {Boolean} slotted + * Whether we are importing the slotted version of the node. + * @return {MarkupContainer} The MarkupContainer object for this element. + */ + importNode(node, flashNode, slotted) { + if (!node) { + return null; + } + + if (this.hasContainer(node, slotted)) { + return this.getContainer(node, slotted); + } + + let container; + const { nodeType, isPseudoElement } = node; + if (node === node.walkerFront.rootNode) { + container = new RootContainer(this, node); + this._elt.appendChild(container.elt); + } + if (node === this.walker.rootNode) { + this._rootNode = node; + } else if (slotted) { + container = new SlottedNodeContainer(this, node, this.inspector); + } else if (nodeType == nodeConstants.ELEMENT_NODE && !isPseudoElement) { + container = new MarkupElementContainer(this, node, this.inspector); + } else if ( + nodeType == nodeConstants.COMMENT_NODE || + nodeType == nodeConstants.TEXT_NODE + ) { + container = new MarkupTextContainer(this, node, this.inspector); + } else { + container = new MarkupReadOnlyContainer(this, node, this.inspector); + } + + if (flashNode) { + container.flashMutation(); + } + + this.setContainer(node, container, slotted); + this._forceUpdateChildren(container); + + this.inspector.emit("container-created", container); + + return container; + }, + + async _onResourceAvailable(resources) { + for (const resource of resources) { + if ( + !this.resourceCommand || + resource.resourceType !== this.resourceCommand.TYPES.ROOT_NODE || + resource.isDestroyed() + ) { + // Only handle alive root-node resources + continue; + } + + if (resource.targetFront.isTopLevel && resource.isTopLevelDocument) { + // The topmost root node will lead to the destruction and recreation of + // the MarkupView. This is handled by the inspector. + continue; + } + + const parentNodeFront = resource.parentNode(); + const container = this.getContainer(parentNodeFront); + if (container) { + // If there is no container for the parentNodeFront, the markup view is + // currently not watching this part of the tree. + this._forceUpdateChildren(container, { + flash: true, + updateLevel: true, + }); + } + } + }, + + _onTargetAvailable({ targetFront }) {}, + + _onTargetDestroyed({ targetFront, isModeSwitching }) { + // Bug 1776250: We only watch targets in order to update containers which + // might no longer be able to display children hosted in remote processes, + // which corresponds to a Browser Toolbox mode switch. + if (isModeSwitching) { + const container = this.getContainer(targetFront.getParentNodeFront()); + if (container) { + this._forceUpdateChildren(container, { + updateLevel: true, + }); + } + } + }, + + /** + * Mutation observer used for included nodes. + */ + _onWalkerMutations(mutations) { + for (const mutation of mutations) { + const type = mutation.type; + const target = mutation.target; + + const container = this.getContainer(target); + if (!container) { + // Container might not exist if this came from a load event for a node + // we're not viewing. + continue; + } + + if ( + type === "attributes" || + type === "characterData" || + type === "customElementDefined" || + type === "events" || + type === "pseudoClassLock" + ) { + container.update(); + } else if ( + type === "childList" || + type === "slotchange" || + type === "shadowRootAttached" + ) { + this._forceUpdateChildren(container, { + flash: true, + updateLevel: true, + }); + } else if (type === "inlineTextChild") { + this._forceUpdateChildren(container, { flash: true }); + container.update(); + } + } + + this._waitForChildren().then(() => { + if (this._destroyed) { + // Could not fully update after markup mutations, the markup-view was destroyed + // while waiting for children. Bail out silently. + return; + } + this._flashMutatedNodes(mutations); + this.inspector.emit("markupmutation", mutations); + + // Since the htmlEditor is absolutely positioned, a mutation may change + // the location in which it should be shown. + if (this.htmlEditor) { + this.htmlEditor.refresh(); + } + }); + }, + + /** + * React to display-change and scrollable-change events from the walker. These are + * events that tell us when something of interest changed on a collection of nodes: + * whether their display type changed, or whether they became scrollable. + * + * @param {Array} nodes + * An array of nodeFronts + */ + _onWalkerNodeStatesChanged(nodes) { + for (const node of nodes) { + const container = this.getContainer(node); + if (container) { + container.update(); + } + } + }, + + /** + * Given a list of mutations returned by the mutation observer, flash the + * corresponding containers to attract attention. + */ + _flashMutatedNodes(mutations) { + const addedOrEditedContainers = new Set(); + const removedContainers = new Set(); + + for (const { type, target, added, removed, newValue } of mutations) { + const container = this.getContainer(target); + + if (container) { + if (type === "characterData") { + addedOrEditedContainers.add(container); + } else if (type === "attributes" && newValue === null) { + // Removed attributes should flash the entire node. + // New or changed attributes will flash the attribute itself + // in ElementEditor.flashAttribute. + addedOrEditedContainers.add(container); + } else if (type === "childList") { + // If there has been removals, flash the parent + if (removed.length) { + removedContainers.add(container); + } + + // If there has been additions, flash the nodes if their associated + // container exist (so if their parent is expanded in the inspector). + added.forEach(node => { + const addedContainer = this.getContainer(node); + if (addedContainer) { + addedOrEditedContainers.add(addedContainer); + + // The node may be added as a result of an append, in which case + // it will have been removed from another container first, but in + // these cases we don't want to flash both the removal and the + // addition + removedContainers.delete(container); + } + }); + } + } + } + + for (const container of removedContainers) { + container.flashMutation(); + } + for (const container of addedOrEditedContainers) { + container.flashMutation(); + } + }, + + /** + * Make sure the given node's parents are expanded and the + * node is scrolled on to screen. + */ + showNode(node, { centered = true, slotted, smoothScroll = false } = {}) { + if (slotted && !this.hasContainer(node, slotted)) { + throw new Error("Tried to show a slotted node not previously imported"); + } else { + this._ensureNodeImported(node); + } + + return this._waitForChildren() + .then(() => { + if (this._destroyed) { + return Promise.reject("markupview destroyed"); + } + return this._ensureVisible(node); + }) + .then(() => { + const container = this.getContainer(node, slotted); + scrollIntoViewIfNeeded(container.editor.elt, centered, smoothScroll); + }, this._handleRejectionIfNotDestroyed); + }, + + _ensureNodeImported(node) { + let parent = node; + + this.importNode(node); + + while ((parent = this._getParentInTree(parent))) { + this.importNode(parent); + this.expandNode(parent); + } + }, + + /** + * Expand the container's children. + */ + _expandContainer(container) { + return this._updateChildren(container, { expand: true }).then(() => { + if (this._destroyed) { + // Could not expand the node, the markup-view was destroyed in the meantime. Just + // silently give up. + return; + } + container.setExpanded(true); + }); + }, + + /** + * Expand the node's children. + */ + expandNode(node) { + const container = this.getContainer(node); + return this._expandContainer(container); + }, + + /** + * Expand the entire tree beneath a container. + * + * @param {MarkupContainer} container + * The container to expand. + */ + _expandAll(container) { + return this._expandContainer(container) + .then(() => { + let child = container.children.firstChild; + const promises = []; + while (child) { + promises.push(this._expandAll(child.container)); + child = child.nextSibling; + } + return Promise.all(promises); + }) + .catch(console.error); + }, + + /** + * Expand the entire tree beneath a node. + * + * @param {DOMNode} node + * The node to expand, or null to start from the top. + * @return {Promise} promise that resolves once all children are expanded. + */ + expandAll(node) { + node = node || this._rootNode; + return this._expandAll(this.getContainer(node)); + }, + + /** + * Collapse the node's children. + */ + collapseNode(node) { + const container = this.getContainer(node); + container.setExpanded(false); + }, + + _collapseAll(container) { + container.setExpanded(false); + const children = container.getChildContainers() || []; + children.forEach(child => this._collapseAll(child)); + }, + + /** + * Collapse the entire tree beneath a node. + * + * @param {DOMNode} node + * The node to collapse. + * @return {Promise} promise that resolves once all children are collapsed. + */ + collapseAll(node) { + this._collapseAll(this.getContainer(node)); + + // collapseAll is synchronous, return a promise for consistency with expandAll. + return Promise.resolve(); + }, + + /** + * Returns either the innerHTML or the outerHTML for a remote node. + * + * @param {NodeFront} node + * The NodeFront to get the outerHTML / innerHTML for. + * @param {Boolean} isOuter + * If true, makes the function return the outerHTML, + * otherwise the innerHTML. + * @return {Promise} that will be resolved with the outerHTML / innerHTML. + */ + _getNodeHTML(node, isOuter) { + let walkerPromise = null; + + if (isOuter) { + walkerPromise = node.walkerFront.outerHTML(node); + } else { + walkerPromise = node.walkerFront.innerHTML(node); + } + + return getLongString(walkerPromise); + }, + + /** + * Retrieve the outerHTML for a remote node. + * + * @param {NodeFront} node + * The NodeFront to get the outerHTML for. + * @return {Promise} that will be resolved with the outerHTML. + */ + getNodeOuterHTML(node) { + return this._getNodeHTML(node, true); + }, + + /** + * Retrieve the innerHTML for a remote node. + * + * @param {NodeFront} node + * The NodeFront to get the innerHTML for. + * @return {Promise} that will be resolved with the innerHTML. + */ + getNodeInnerHTML(node) { + return this._getNodeHTML(node); + }, + + /** + * Listen to mutations, expect a given node to be removed and try and select + * the node that sits at the same place instead. + * This is useful when changing the outerHTML or the tag name so that the + * newly inserted node gets selected instead of the one that just got removed. + */ + reselectOnRemoved(removedNode, reason) { + // Only allow one removed node reselection at a time, so that when there are + // more than 1 request in parallel, the last one wins. + this.cancelReselectOnRemoved(); + + // Get the removedNode index in its parent node to reselect the right node. + const isRootElement = ["html", "svg"].includes( + removedNode.tagName.toLowerCase() + ); + const oldContainer = this.getContainer(removedNode); + const parentContainer = this.getContainer(removedNode.parentNode()); + const childIndex = parentContainer + .getChildContainers() + .indexOf(oldContainer); + + const onMutations = (this._removedNodeObserver = mutations => { + let isNodeRemovalMutation = false; + for (const mutation of mutations) { + const containsRemovedNode = + mutation.removed && mutation.removed.some(n => n === removedNode); + if ( + mutation.type === "childList" && + (containsRemovedNode || isRootElement) + ) { + isNodeRemovalMutation = true; + break; + } + } + if (!isNodeRemovalMutation) { + return; + } + + this.inspector.off("markupmutation", onMutations); + this._removedNodeObserver = null; + + // Don't select the new node if the user has already changed the current + // selection. + if ( + this.inspector.selection.nodeFront === parentContainer.node || + (this.inspector.selection.nodeFront === removedNode && isRootElement) + ) { + const childContainers = parentContainer.getChildContainers(); + if (childContainers?.[childIndex]) { + const childContainer = childContainers[childIndex]; + this._markContainerAsSelected(childContainer, reason); + if (childContainer.hasChildren) { + this.expandNode(childContainer.node); + } + this.emit("reselectedonremoved"); + } + } + }); + + // Start listening for mutations until we find a childList change that has + // removedNode removed. + this.inspector.on("markupmutation", onMutations); + }, + + /** + * Make sure to stop listening for node removal markupmutations and not + * reselect the corresponding node when that happens. + * Useful when the outerHTML/tagname edition failed. + */ + cancelReselectOnRemoved() { + if (this._removedNodeObserver) { + this.inspector.off("markupmutation", this._removedNodeObserver); + this._removedNodeObserver = null; + this.emit("canceledreselectonremoved"); + } + }, + + /** + * Replace the outerHTML of any node displayed in the inspector with + * some other HTML code + * + * @param {NodeFront} node + * Node which outerHTML will be replaced. + * @param {String} newValue + * The new outerHTML to set on the node. + * @param {String} oldValue + * The old outerHTML that will be used if the user undoes the update. + * @return {Promise} that will resolve when the outer HTML has been updated. + */ + updateNodeOuterHTML(node, newValue) { + const container = this.getContainer(node); + if (!container) { + return Promise.reject(); + } + + // Changing the outerHTML removes the node which outerHTML was changed. + // Listen to this removal to reselect the right node afterwards. + this.reselectOnRemoved(node, "outerhtml"); + return node.walkerFront.setOuterHTML(node, newValue).catch(() => { + this.cancelReselectOnRemoved(); + }); + }, + + /** + * Replace the innerHTML of any node displayed in the inspector with + * some other HTML code + * @param {Node} node + * node which innerHTML will be replaced. + * @param {String} newValue + * The new innerHTML to set on the node. + * @param {String} oldValue + * The old innerHTML that will be used if the user undoes the update. + * @return {Promise} that will resolve when the inner HTML has been updated. + */ + updateNodeInnerHTML(node, newValue, oldValue) { + const container = this.getContainer(node); + if (!container) { + return Promise.reject(); + } + + return new Promise((resolve, reject) => { + container.undo.do( + () => { + node.walkerFront.setInnerHTML(node, newValue).then(resolve, reject); + }, + () => { + node.walkerFront.setInnerHTML(node, oldValue); + } + ); + }); + }, + + /** + * Insert adjacent HTML to any node displayed in the inspector. + * + * @param {NodeFront} node + * The reference node. + * @param {String} position + * The position as specified for Element.insertAdjacentHTML + * (i.e. "beforeBegin", "afterBegin", "beforeEnd", "afterEnd"). + * @param {String} newValue + * The adjacent HTML. + * @return {Promise} that will resolve when the adjacent HTML has + * been inserted. + */ + insertAdjacentHTMLToNode(node, position, value) { + const container = this.getContainer(node); + if (!container) { + return Promise.reject(); + } + + let injectedNodes = []; + + return new Promise((resolve, reject) => { + container.undo.do( + () => { + // eslint-disable-next-line no-unsanitized/method + node.walkerFront + .insertAdjacentHTML(node, position, value) + .then(nodeArray => { + injectedNodes = nodeArray.nodes; + return nodeArray; + }) + .then(resolve, reject); + }, + () => { + node.walkerFront.removeNodes(injectedNodes); + } + ); + }); + }, + + /** + * Open an editor in the UI to allow editing of a node's html. + * + * @param {NodeFront} node + * The NodeFront to edit. + */ + beginEditingHTML(node) { + // We use outer html for elements, but inner html for fragments. + const isOuter = node.nodeType == nodeConstants.ELEMENT_NODE; + const html = isOuter + ? this.getNodeOuterHTML(node) + : this.getNodeInnerHTML(node); + html.then(oldValue => { + const container = this.getContainer(node); + if (!container) { + return; + } + // Load load and create HTML Editor as it is rarely used and fetch complex deps + if (!this.htmlEditor) { + const HTMLEditor = require("resource://devtools/client/inspector/markup/views/html-editor.js"); + this.htmlEditor = new HTMLEditor(this.doc); + } + this.htmlEditor.show(container.tagLine, oldValue); + const start = this.telemetry.msSystemNow(); + this.htmlEditor.once("popuphidden", (commit, value) => { + // Need to focus the <html> element instead of the frame / window + // in order to give keyboard focus back to doc (from editor). + this.doc.documentElement.focus(); + + if (commit) { + if (isOuter) { + this.updateNodeOuterHTML(node, value, oldValue); + } else { + this.updateNodeInnerHTML(node, value, oldValue); + } + } + + const end = this.telemetry.msSystemNow(); + this.telemetry.recordEvent("edit_html", "inspector", null, { + made_changes: commit, + time_open: end - start, + }); + }); + + this.emit("begin-editing"); + }); + }, + + /** + * Expand or collapse the given node. + * + * @param {NodeFront} node + * The NodeFront to update. + * @param {Boolean} expanded + * Whether the node should be expanded/collapsed. + * @param {Boolean} applyToDescendants + * Whether all descendants should also be expanded/collapsed + */ + setNodeExpanded(node, expanded, applyToDescendants) { + if (expanded) { + if (applyToDescendants) { + this.expandAll(node); + } else { + this.expandNode(node); + } + } else if (applyToDescendants) { + this.collapseAll(node); + } else { + this.collapseNode(node); + } + }, + + /** + * Mark the given node selected, and update the inspector.selection + * object's NodeFront to keep consistent state between UI and selection. + * + * @param {NodeFront} aNode + * The NodeFront to mark as selected. + * @param {String} reason + * The reason for marking the node as selected. + * @return {Boolean} False if the node is already marked as selected, true + * otherwise. + */ + markNodeAsSelected(node, reason = "nodeselected") { + const container = this.getContainer(node); + return this._markContainerAsSelected(container); + }, + + _markContainerAsSelected(container, reason) { + if (!container || this._selectedContainer === container) { + return false; + } + + const { node } = container; + + // Un-select and remove focus from the previous container. + if (this._selectedContainer) { + this._selectedContainer.selected = false; + this._selectedContainer.clearFocus(); + } + + // Select the new container. + this._selectedContainer = container; + if (node) { + this._selectedContainer.selected = true; + } + + // Change the current selection if needed. + if (!this._isContainerSelected(this._selectedContainer)) { + const isSlotted = container.isSlotted(); + this.inspector.selection.setNodeFront(node, { reason, isSlotted }); + } + + return true; + }, + + /** + * Make sure that every ancestor of the selection are updated + * and included in the list of visible children. + */ + _ensureVisible(node) { + while (node) { + const container = this.getContainer(node); + const parent = this._getParentInTree(node); + if (!container.elt.parentNode) { + const parentContainer = this.getContainer(parent); + if (parentContainer) { + this._forceUpdateChildren(parentContainer, { expand: true }); + } + } + + node = parent; + } + return this._waitForChildren(); + }, + + /** + * Unmark selected node (no node selected). + */ + unmarkSelectedNode() { + if (this._selectedContainer) { + this._selectedContainer.selected = false; + this._selectedContainer = null; + } + }, + + /** + * Check if the current selection is a descendent of the container. + * if so, make sure it's among the visible set for the container, + * and set the dirty flag if needed. + * + * @return The node that should be made visible, if any. + */ + _checkSelectionVisible(container) { + let centered = null; + let node = this.inspector.selection.nodeFront; + while (node) { + if (this._getParentInTree(node) === container.node) { + centered = node; + break; + } + node = this._getParentInTree(node); + } + + return centered; + }, + + async _forceUpdateChildren(container, options = {}) { + const { flash, updateLevel, expand } = options; + + // Set childrenDirty to true to force fetching new children. + container.childrenDirty = true; + + // Update the children to take care of changes in the markup view DOM + await this._updateChildren(container, { expand, flash }); + + // The markup view may have been destroyed in the meantime + if (this._destroyed) { + return; + } + + if (updateLevel) { + // Update container (and its subtree) DOM tree depth level for + // accessibility where necessary. + container.updateLevel(); + } + }, + + /** + * Make sure all children of the given container's node are + * imported and attached to the container in the right order. + * + * Children need to be updated only in the following circumstances: + * a) We just imported this node and have never seen its children. + * container.childrenDirty will be set by importNode in this case. + * b) We received a childList mutation on the node. + * container.childrenDirty will be set in that case too. + * c) We have changed the selection, and the path to that selection + * wasn't loaded in a previous children request (because we only + * grab a subset). + * container.childrenDirty should be set in that case too! + * + * @param {MarkupContainer} container + * The markup container whose children need updating + * @param {Object} options + * Options are {expand:boolean,flash:boolean} + * @return {Promise} that will be resolved when the children are ready + * (which may be immediately). + */ + _updateChildren(container, options) { + // Slotted containers do not display any children. + if (container.isSlotted()) { + return Promise.resolve(container); + } + + const expand = options?.expand; + const flash = options?.flash; + + container.hasChildren = container.node.hasChildren; + // Accessibility should either ignore empty children or semantically + // consider them a group. + container.setChildrenRole(); + + if (!this._queuedChildUpdates) { + this._queuedChildUpdates = new Map(); + } + + if (this._queuedChildUpdates.has(container)) { + return this._queuedChildUpdates.get(container); + } + + if (!container.childrenDirty) { + return Promise.resolve(container); + } + + // Before bailing out for other conditions, check if the unavailable + // children badge needs updating (Bug 1776250). + if ( + typeof container?.editor?.hasUnavailableChildren == "function" && + container.editor.hasUnavailableChildren() != + container.node.childrenUnavailable + ) { + container.update(); + } + + if ( + container.inlineTextChild && + container.inlineTextChild != container.node.inlineTextChild + ) { + // This container was doing double duty as a container for a single + // text child, back that out. + this._containers.delete(container.inlineTextChild); + container.clearInlineTextChild(); + + if (container.hasChildren && container.selected) { + container.setExpanded(true); + } + } + + if (container.node.inlineTextChild) { + container.setExpanded(false); + // this container will do double duty as the container for the single + // text child. + while (container.children.firstChild) { + container.children.firstChild.remove(); + } + + container.setInlineTextChild(container.node.inlineTextChild); + + this.setContainer(container.node.inlineTextChild, container); + container.childrenDirty = false; + return Promise.resolve(container); + } + + if (!container.hasChildren) { + while (container.children.firstChild) { + container.children.firstChild.remove(); + } + container.childrenDirty = false; + container.setExpanded(false); + return Promise.resolve(container); + } + + // If we're not expanded (or asked to update anyway), we're done for + // now. Note that this will leave the childrenDirty flag set, so when + // expanded we'll refresh the child list. + if (!(container.expanded || expand)) { + return Promise.resolve(container); + } + + // We're going to issue a children request, make sure it includes the + // centered node. + const centered = this._checkSelectionVisible(container); + + // Children aren't updated yet, but clear the childrenDirty flag anyway. + // If the dirty flag is re-set while we're fetching we'll need to fetch + // again. + container.childrenDirty = false; + + const isShadowHost = container.node.isShadowHost; + const updatePromise = this._getVisibleChildren(container, centered) + .then(children => { + if (!this._containers) { + return Promise.reject("markup view destroyed"); + } + this._queuedChildUpdates.delete(container); + + // If children are dirty, we got a change notification for this node + // while the request was in progress, we need to do it again. + if (container.childrenDirty) { + return this._updateChildren(container, { + expand: centered || expand, + }); + } + + const fragment = this.doc.createDocumentFragment(); + + for (const child of children.nodes) { + const slotted = !isShadowHost && child.isDirectShadowHostChild; + const childContainer = this.importNode(child, flash, slotted); + fragment.appendChild(childContainer.elt); + } + + while (container.children.firstChild) { + container.children.firstChild.remove(); + } + + if (!children.hasFirst) { + const topItem = this.buildMoreNodesButtonMarkup(container); + fragment.insertBefore(topItem, fragment.firstChild); + } + if (!children.hasLast) { + const bottomItem = this.buildMoreNodesButtonMarkup(container); + fragment.appendChild(bottomItem); + } + + container.children.appendChild(fragment); + return container; + }) + .catch(this._handleRejectionIfNotDestroyed); + this._queuedChildUpdates.set(container, updatePromise); + return updatePromise; + }, + + buildMoreNodesButtonMarkup(container) { + const elt = this.doc.createElement("li"); + elt.classList.add("more-nodes", "devtools-class-comment"); + + const label = this.doc.createElement("span"); + label.textContent = INSPECTOR_L10N.getStr("markupView.more.showing"); + elt.appendChild(label); + + const button = this.doc.createElement("button"); + button.setAttribute("href", "#"); + const showAllString = PluralForm.get( + container.node.numChildren, + INSPECTOR_L10N.getStr("markupView.more.showAll2") + ); + button.textContent = showAllString.replace( + "#1", + container.node.numChildren + ); + elt.appendChild(button); + + button.addEventListener("click", () => { + container.maxChildren = -1; + this._forceUpdateChildren(container); + }); + + return elt; + }, + + _waitForChildren() { + if (!this._queuedChildUpdates) { + return Promise.resolve(undefined); + } + + return Promise.all([...this._queuedChildUpdates.values()]); + }, + + /** + * Return a list of the children to display for this container. + */ + async _getVisibleChildren(container, centered) { + let maxChildren = container.maxChildren || this.maxChildren; + if (maxChildren == -1) { + maxChildren = undefined; + } + + // We have to use node's walker and not a top level walker + // as for fission frames, we are going to have multiple walkers + const inspectorFront = await container.node.targetFront.getFront( + "inspector" + ); + return inspectorFront.walker.children(container.node, { + maxNodes: maxChildren, + center: centered, + }); + }, + + /** + * The parent of a given node as rendered in the markup view is not necessarily + * node.parentNode(). For instance, shadow roots don't have a parentNode, but a host + * element. However they are represented as parent and children in the markup view. + * + * Use this method when you are interested in the parent of a node from the perspective + * of the markup-view tree, and not from the perspective of the actual DOM. + */ + _getParentInTree(node) { + const parent = node.parentOrHost(); + if (!parent) { + return null; + } + + // If the parent node belongs to a different target while the node's target is the + // one selected by the user in the iframe picker, we don't want to go further up. + if ( + node.targetFront !== parent.targetFront && + node.targetFront == + this.inspector.commands.targetCommand.selectedTargetFront + ) { + return null; + } + + return parent; + }, + + /** + * Tear down the markup panel. + */ + destroy() { + if (this._destroyed) { + return; + } + + this._destroyed = true; + + this._hoveredContainer = null; + + if (this._contextMenu) { + this._contextMenu.destroy(); + this._contextMenu = null; + } + + if (this._eventDetailsTooltip) { + this._eventDetailsTooltip.destroy(); + this._eventDetailsTooltip = null; + } + + if (this.htmlEditor) { + this.htmlEditor.destroy(); + this.htmlEditor = null; + } + + if (this.imagePreviewTooltip) { + this.imagePreviewTooltip.destroy(); + this.imagePreviewTooltip = null; + } + + if (this._undo) { + this._undo.destroy(); + this._undo = null; + } + + if (this._shortcuts) { + this._shortcuts.destroy(); + this._shortcuts = null; + } + + this.popup.destroy(); + this.popup = null; + this._selectedContainer = null; + + this._elt.removeEventListener("blur", this._onBlur, true); + this._elt.removeEventListener("click", this._onMouseClick); + this._elt.removeEventListener("contextmenu", this._onContextMenu); + this._elt.removeEventListener("mousemove", this._onMouseMove); + this._elt.removeEventListener("mouseout", this._onMouseOut); + this._frame.removeEventListener("focus", this._onFocus); + this._unsubscribeFromToolboxStore(); + this.inspector.selection.off("new-node-front", this._onNewSelection); + this.resourceCommand.unwatchResources( + [this.resourceCommand.TYPES.ROOT_NODE], + { onAvailable: this._onResourceAvailable } + ); + this.targetCommand.unwatchTargets({ + types: [this.targetCommand.TYPES.FRAME], + onAvailable: this._onTargetAvailable, + onDestroyed: this._onTargetDestroyed, + }); + this.inspector.toolbox.nodePicker.off( + "picker-node-hovered", + this._onToolboxPickerHover + ); + this.inspector.toolbox.nodePicker.off( + "picker-node-canceled", + this._onToolboxPickerCanceled + ); + this.inspector.highlighters.off( + "highlighter-shown", + this.onHighlighterShown + ); + this.inspector.highlighters.off( + "highlighter-hidden", + this.onHighlighterHidden + ); + this.win.removeEventListener("copy", this._onCopy); + this.win.removeEventListener("mouseup", this._onMouseUp); + + this._walkerEventListener.destroy(); + this._walkerEventListener = null; + + this._prefObserver.off( + ATTR_COLLAPSE_ENABLED_PREF, + this._onCollapseAttributesPrefChange + ); + this._prefObserver.off( + ATTR_COLLAPSE_LENGTH_PREF, + this._onCollapseAttributesPrefChange + ); + this._prefObserver.destroy(); + + for (const [, container] of this._containers) { + container.destroy(); + } + this._containers = null; + + this._elt.innerHTML = ""; + this._elt = null; + + this.controllerWindow = null; + this.doc = null; + this.highlighters = null; + this.walker = null; + this.resourceCommand = null; + this.win = null; + + this._lastDropTarget = null; + this._lastDragTarget = null; + }, + + /** + * Find the closest element with class tag-line. These are used to indicate + * drag and drop targets. + * + * @param {DOMNode} el + * @return {DOMNode} + */ + findClosestDragDropTarget(el) { + return el.classList.contains("tag-line") + ? el + : el.querySelector(".tag-line") || el.closest(".tag-line"); + }, + + /** + * Takes an element as it's only argument and marks the element + * as the drop target + */ + indicateDropTarget(el) { + if (this._lastDropTarget) { + this._lastDropTarget.classList.remove("drop-target"); + } + + if (!el) { + return; + } + + const target = this.findClosestDragDropTarget(el); + if (target) { + target.classList.add("drop-target"); + this._lastDropTarget = target; + } + }, + + /** + * Takes an element to mark it as indicator of dragging target's initial place + */ + indicateDragTarget(el) { + if (this._lastDragTarget) { + this._lastDragTarget.classList.remove("drag-target"); + } + + if (!el) { + return; + } + + const target = this.findClosestDragDropTarget(el); + if (target) { + target.classList.add("drag-target"); + this._lastDragTarget = target; + } + }, + + /** + * Used to get the nodes required to modify the markup after dragging the + * element (parent/nextSibling). + */ + get dropTargetNodes() { + const target = this._lastDropTarget; + + if (!target) { + return null; + } + + let parent, nextSibling; + + if ( + target.previousElementSibling && + target.previousElementSibling.nodeName.toLowerCase() === "ul" + ) { + parent = target.parentNode.container.node; + nextSibling = null; + } else { + parent = target.parentNode.container.node.parentNode(); + nextSibling = target.parentNode.container.node; + } + + if (nextSibling) { + while ( + nextSibling.isMarkerPseudoElement || + nextSibling.isBeforePseudoElement + ) { + nextSibling = + this.getContainer(nextSibling).elt.nextSibling.container.node; + } + if (nextSibling.isAfterPseudoElement) { + parent = target.parentNode.container.node.parentNode(); + nextSibling = null; + } + } + + if (parent.nodeType !== nodeConstants.ELEMENT_NODE) { + return null; + } + + return { parent, nextSibling }; + }, +}; + +/** + * Copy the content of a longString containing HTML code to the clipboard. + * The string is retrieved, and possibly beautified if the user has the right pref set and + * then placed in the clipboard. + * + * @param {Promise} longStringActorPromise + * The promise expected to resolve a LongStringActor instance + */ +async function copyLongHTMLString(longStringActorPromise) { + let string = await getLongString(longStringActorPromise); + + if (Services.prefs.getBoolPref(BEAUTIFY_HTML_ON_COPY_PREF)) { + const { indentUnit, indentWithTabs } = getTabPrefs(); + string = beautify.html(string, { + // eslint-disable-next-line camelcase + preserve_newlines: false, + // eslint-disable-next-line camelcase + indent_size: indentWithTabs ? 1 : indentUnit, + // eslint-disable-next-line camelcase + indent_char: indentWithTabs ? "\t" : " ", + unformatted: [], + }); + } + + clipboardHelper.copyString(string); +} + +/** + * Map a number from one range to another. + */ +function map(value, oldMin, oldMax, newMin, newMax) { + const ratio = oldMax - oldMin; + if (ratio == 0) { + return value; + } + return newMin + (newMax - newMin) * ((value - oldMin) / ratio); +} + +module.exports = MarkupView; |